The impulse response characteristics and modulation bandwidth of blue light-emitting diode with a special-designed AlGaN staircase electron blocking layer are investiggated by using square wave pulse and sine wave modulation methods. And the energy band diagrams of the blue light-emitting diode (LED) with this special-designed staircase electron blocking layer have been numerically investigated using the APSYS simulation software. The simulation shows that ΔEc increases 43 meV and ΔEv decreases 36 meV. The results show that blue light-emitting diode with a special-designed AlGaN staircase electron blocking layer has better light output power and response performance. The superior performance can be attributed to higher carrier injection density of the active region, which improves the electron/hole radiative recombination rate.